Alpha Sigma Delta Radio Society – W5TC

Amateur Radio at the University of Oklahoma

Repeaters, repeaters, repeaters

Operating “on the ultra-highs” is a popular part of amateur radio though by all means not the only part.  Bouncing signals off the ionosphere is a popular part, too, and requires no infrastructure beyond your station’s antenna.  But people love to talk to other people on their small (and getting cheaper) handi-talkies.

The OU club is blessed with a generous alumnus — local attorney Micheal Salem, N5MS — who likes to build the infrastructure part and let us use it (Law degree, sure, but he was an EE as an undergrad!).  The club has been the beneficiary of the 146.8800 MHz FM analog (20K0F3E) repeater for some 30 years now.  It had been off the air in recent years, for a variety of reasons, but since mid-August, it has been back on the air continuously.  If you have a receiver (or transceiver) for VHF and have the frequency plugged in, you’ve no doubt heard the increased traffic.

As of last night, there is a new repeater on the air on 443.8250 MHz (7K60FXE) but it is neither FM nor analog.  This repeater is a DMR, or Digital Mobile Radio, repeater and requires DMR equipment to use.   I won’t go into technical details other than “TDMA” and “4FSK”.   Motorola Solutions calls their implementation of DMR “MOTOTRBO™“.  I will, however, give you some breadcrumbs:

Digital Mobile Radio via Wikipedia

The DMR-MARC Worldwide Network

RTL-SDR Tutorial: Decoding Digital Voice (P25, DMR, NXDN, D-STAR) with DSD



Edmond Siren Testing

Do you want to use amateur radio to give back to the community? Signup to help with the Edmond Siren Test on the first Saturday ... read on

Informational Meeting

Title: Informational Meeting Location: DEH 320 (Devon) Description: This meeting will be an informational meeting that we talk about our organization, what we do, and how to ... read on

Ham Holiday

Title: Ham HolidayLocation: Bricktown Hotel/Conference Center I-40 and Martin Luther King, Jr. Ave. Oklahoma City, OklahomaLink out: Click hereDescription: Oklahoma's Hamfest! Members from the ... read on

Meeting Minutes 3.26.2013

Starts at 7:03 pm Reminder to pay dues. 11 members present (one from SCARS!)   Carey gave an update on the weekly net 5 check ins on first try Receiver issues/sensitivity ... read on

Meeting Minutes 02.26.2013

Meeting started at 7:01 pm 12 attendees including our speaker,  Ken Brown N5KUK General Business:  Tuscani Pizza for dinner! Addressing the email situation: sign in with/email Victoria Outreach opportunities: Cycling event ... read on

Meeting Minutes 01.29.2013

Meeting began at 7:06pm Megan discusses food and speakers and reminds to PAY DUES!! Treasurer’s Report: Current balance: $978.05 Potential interests for future meeting speakers: Morse code Antenna theory DSTARR SKYWARN Tuesday Feb ... read on

February Club Meeting

Title: February Club MeetingLocation: NWC 1350Description: There will be food and a speaker TBD. Please join us and have a good time.Start Time: 19:00Date: 2013-02-26End Time: ... read on

January Meeting

The club meeting for January has been moved.  The meeting was supposed to be January 22, but due to a scheduling conflict, we have had ... read on

Meeting Minutes Oct. 23 2012

Meeting convened at 7.00 pm, NWC 1350 The club signed cards for Dr. Forsyth, wishing him a speedy recovery.   Welcome from Megan! Victoria gave a brief review of ... read on
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